Definition
A short-duration compressor stall in a turbine engine that clears itself almost immediately, typically signaled by a single audible 'pop' or 'bang' and a brief disturbance in engine indications before normal airflow through the compressor is restored.
Plain English
A quick, self-correcting hiccup in the airflow through a jet engine's compressor. You may hear a pop or bang, but the engine sorts itself out within a moment and keeps running normally.
Context Anchor
Seen in turbine engine operating discussions, especially when learning about compressor stalls and abnormal engine indications.
Derivation
Transient' comes from the Latin 'transire,' meaning 'to pass through' or 'to go across.' It describes something that passes quickly and does not last. In this term, it tells you the stall is short-lived rather than sustained.
Why Pilots Care
Recognizing a transient stall prevents unnecessary throttle or control inputs that could turn it into a sustained problem.
Grounding Statement
Picture the engine airflow briefly breaking up, then smoothing out again as the engine recovers.
Intuition Check
Transient does not mean harmless; it means brief. Stall here does not mean a wing stall; it means airflow inside the engine compressor has broken down for a moment.
Example Sentence 1
During the climb, the crew heard a single sharp pop from the right engine, but the gauges returned to normal almost immediately, consistent with a transient stall.
Example Sentence 2
Training emphasizes that most transient stalls clear without action, unlike sustained stalls requiring specific recovery procedures.